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Old 04-16-2020, 01:36 PM   #1
gmassacc
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Default RNA-Seq Library Prep from PAXgene RNA Blood Tubes

Hi all,

My group is starting an RNA-seq project from patient frozen blood stored in PAXgene RNA blood collection tubes. We have experience performing library preps on PBMCs and isolated monocytes using the Takara Bio SMARTer RNA-seq kits. For this project, we have heard that one issue that could arise is the globin gene counts after sequencing. Has anybody had any issues with this?

Right now, I am thinking about extracting RNA from the PAXgene tube using the QIAGEN PAXgene extraction kit, then using this kit: GLOBINclear Kit for globin mRNA depletion and then running the standard library prep kits we have in the past.

However, Illumina sells a library prep kit that removes globin mRNA in the library prep itself: https://www.illumina.com/products/by...na-globin.html

Does anybody have any experience with this kit?

Thanks for all your help!
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Old 04-16-2020, 03:20 PM   #2
luc
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A secret tip:
https://www.qiagen.com/us/products/d...inginformation
Much easier than any other solution.
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Old 04-17-2020, 12:23 AM   #3
nucacidhunter
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Illumina kit is gold standard in this application if RNA quantity is not limiting. On the other hand performance of Qiagen kit varies and I would suggest to trial it before committing to use it.
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Old 04-17-2020, 05:29 AM   #4
jteeee2
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Agree with @nucacidhunter. We were initially excited about the new Qiagen product but have also seen some odd performance issues...particularly when including globin-reduction probes. The Illumina TruSeq kit is solid. I've had good success with the NEBNext Ultra II Directional RNA kits with globin depletion. NEB also has a protocol for globin depletion followed by poly-A enrichment if you were interested in limiting transcript coverage to mRNAs.
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Old 04-17-2020, 06:36 AM   #5
gmassacc
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Thanks for the replies! I will look into the NEB kit and the Illumina!
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Old 04-17-2020, 09:38 AM   #6
jteeee2
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There's also this paper that came out a few days ago which suggests you don't need to deplete globin at all if you're starting with Paxgene blood.
https://www.nature.com/articles/s41598-020-62801-6

I'd probably err on the side of caution and go ahead with your depletion strategy It won't hurt.
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Old 04-20-2020, 06:04 AM   #7
gmassacc
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Super informative paper! Thanks jteeee2!
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